fvp-tftf.cactus_mm: Increase timeout 450 -> 500s

As there can be seen case(s) when the test times out prematurely in Tux.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I3f04b7703db956c77ee5be0946f19ef168be7cc0
diff --git a/run_config/fvp-tftf.cactus_mm b/run_config/fvp-tftf.cactus_mm
index 874f3b8..3ce6129 100644
--- a/run_config/fvp-tftf.cactus_mm
+++ b/run_config/fvp-tftf.cactus_mm
@@ -16,7 +16,7 @@
 }
 
 generate_lava_job_template() {
-	uart="0" lava_timeout="450" file="tftf.exp" track_expect
+	uart="0" lava_timeout="500" file="tftf.exp" track_expect
 	uart="1" file="hold_uart.exp" track_expect
 	uart="2" file="hold_uart.exp" track_expect